Force		measure of how far an object moves in a certain amount of time
motion		change in an object's position
mass		force that acts between surfaces that touch each other
friction		the location of an object
position		anything that has mass and takes up space.
Distance		push or pull
Speed		the length of a line between two points
matter		the force that pulls objects toward each other.
Gravity		acts against the pull of gravity to slow the moving object
air resistance		the amount of matter that makes up an object